CN104620013A

CN104620013A - Method for producing a subassembly and subassembly

Info

Publication number: CN104620013A
Application number: CN201380046857.0A
Authority: CN
Inventors: 斯特凡·巴特洛格; M·基贝尔
Original assignee: Inventus Engineering GmbH
Current assignee: Inventus Engineering GmbH
Priority date: 2012-07-09
Filing date: 2013-07-08
Publication date: 2015-05-13
Anticipated expiration: 2033-07-08
Also published as: US20150211596A1; EP2870379A1; US20160298715A1; US9482304B2; HK1205548A1; DE102012013480B4; WO2014009000A1; CN104620013B; EP2870379B1; DE102012013480A1

Abstract

Method for producing a subassembly and subassembly, wherein the subassembly comprises a separating body (2) and at least one flow channel (3, 4) provided on said separating body and extending along it with at least one flow path (5, 6) to influence a flow of a magneto-rheological fluid along the flow channel of the separating body. The separating body comprises a magnetic field generation device (8) for generating a magnetic field and a field closing device (9). At least the magnetic field generation device and the field closing device are filled with at least one solidifying medium (10) using a placeholder (29) which can be removed to form the three-dimensionally predefined flow channels (3, 4) on the separating body.

Description

Assembly manufacture method and assembly

The present invention relates to a kind of assembly and assembly manufacture method, wherein, this assembly comprises the spacer body with the runner extended therein.Magneto-rheological fluid is subject to the impact of field generator for magnetic along the flowing of runner and produces the environment of restriction.

Known such assembly in the prior art, wherein the adjustment that is circulated through of magneto-rheological fluid is on purpose weakened in the corresponding magnetic field at runner place, or is even blocked.

Such as known such damper, it comprises the damping piston with magnetic rheological valve, and wherein, damping intensity depends on applied magnetic field.This damping piston with magnetic rheological valve comprises multiple parts, they must carefully be manufactured in case can when do not have excessive discrete in batch and cause thus performance difference reproducible installation is provided and and then provides damper.

The magnet case in the damping gap that electronic magnetorheological damping valve comprises the electric coil be wound on core body, magneto-rheological fluid flows through and this magnetic field closed.Some assemblies carefully must be installed and mutually seal to guarantee the desired function when pressure reaches 600 bar.This needs quite high cost, thus manufactures this assembly complicated and thus relatively costly.

US2002/0130001A1 discloses a kind of magnetorheological fluid damper, and wherein piston has the annulus being divided into four channel sections at its side face.Piston has an outflow ring and an inner carrier core, and magnetic coil reels around its longitudinal axis.On the outer surface of stream ring, be provided with four the cross mounting grooves be distributed on periphery, they are equipped with through hole inwardly.In order to be connected with piston core by stream ring, spray into plastics from the outside on mounting groove, these plastics are through described through hole and described annulus and form the bridge tower with radial protrusion, and described radial protrusion extends to the magnetic coil on this piston core always.Now, so formulate straying quatity, that is, quite a few permission magnetorheological fluid flow of annulus.But the shortcoming of such fluid damper is, the radial protrusion of described bridge tower must bear very high shearing force when bearing load, and this can cause endurance issues.In addition, really the annulus of quite a few will be made open by the amount of plastic sprayed into, but can not ensure to keep the repeatably constant shapes of open annulus, this is because the plastics of flowing all differently flow into annulus at every turn, make may to have during fabrication obvious discrete in batch.

US7,849,983B2 disclose a kind of magnetorheological fluid damper with piston, this piston be included in pole on axial two ends and around its longitudinal axis coil of wire around coil.Piston moves and is separated in the first MR damper chamber and the second MR damper chamber in cylindrical housings.Damping gap is arranged between the inner surface of radial direction of outer surface of piston and cylindrical shell diametrically.During manufacture, piston is placed into casting moulds together with metal pole and electric coil and sprays injection of polymer under stress.Therefore piston utilizes polymer on the outer surface to provide the outer surface of regulation.But its shortcoming is, piston must be guided in cylindrical housings very exactly by bearing device, to avoid producing inconsistent gap and avoid piston to contact with the internal surface of cylinder cylindrical shell on side face.In addition, cylindrical housings must be made up of magnetic permeable material so that can closed magnetic field.

Therefore, task of the present invention is to provide a kind of assembly manufacture method and such assembly, can realize the repeated manufacture of this assembly whereby at low cost.

The method of the feature by having claim 1 has been come by this task.Assembly according to the present invention is the theme of claim 12.Preferred improvement project is the theme of dependent claims.Of the present invention other advantage and feature from general introduction and embodiment explanation obtain.

Method of the present invention is for the manufacture of a kind of assembly, it has spacer body and at least one is arranged on this spacer body or is located in this spacer body and along spacer body or the runner that extends in spacer body, this runner has at least one flowing road, for affect magneto-rheological fluid along runner or the flowing of regional area dividing individual runner.In addition, this spacer body also has multiple assembly and has at least one field generator for magnetic for generation of magnetic field and at least one closing device for this reason.Described field generator for magnetic and field closing device are at least filled with curing medium when using at least one placeholders at least partially for forming described runner or runner, for forming at least one predetermined three-dimensional runner on this spacer body, it can be used after placeholders is taken out.

The predetermined runner of the space retained by placeholders when filling as three-dimensional after placeholders is taken out is available.Especially in order to the hydraulic pressure seal of the assembly of spacer body connects, at least this field generator for magnetic together with the field closing device of spacer body by the curing medium poured into a mould such as in mould material form or by least one plastic encapsulation pressure injection.Method of the present invention has many advantages, because it allows the simple manufacture of invention components.Utilize the assembly of the inventive method manufacture to have high repeatability and can high load be born.The method cost while obtained quality is very low.

The arrangement that runner " edge " spacer body extends refers to that runner extends to the other end from one end in the sense of the present invention.Runner energy straight line is formed, but also can have and manyly turn round or extend obliquely according to serpentine curve or pass through.

The flowing of magneto-rheological fluid is at least affected in this runner subrange.Do not need the impact in whole length range.

Core body is preferably surrounded by the coil carrier be such as made up of plastics.Electric coil device is preferably wound onto on coil carrier.

The linkage structure be made up of curing medium preferably hydraulic pressure means of press seals pressure, thus magneto-rheological fluid has to flow through runner.

Before filling, first field generator for magnetic is advantageously wound onto on core body or coil carrier.Core body can be added in field generator for magnetic before filling.At least one placeholders is in place in this closing device.Subsequently, core body is filled with field generator for magnetic and field closing device, thus at least one runner described is available after taking out this or these placeholders subsequently, and spacer body itself is formed in a fluid tight manner.

Advantageously, at least one partition wall is arranged on coil carrier for runner is divided at least two flow paths.

In order to manufacture, form inserting member or an insertion part or push portion, it is such as made up of lamellar body, and lamellar body is formed by as the first shim of placeholders, at least one partition wall and at least one second shim as placeholders.

At this also it is possible that inserting member is made up of one or more placeholders.Such as when runner is not divided into runner, the placeholders adopting an independent placeholders or be made up of multiple part.And this runner should be divided into multiple flow path, thus inserting member is made up of the lamellar body of overlapped different component.

When mounted, core body is preferably introduced in a closing device together with electric coil device and at least one inserting member with coil carrier.Preferably this closing device is introduced in a mould in advance or subsequently.Then, carry out with the cast of curing medium such as in mould material form, or carry out plastics or other is to the spray of this favourable material.Cast can be carried out under normal pressure, but also can carry out when adopting negative pressure and/or superpressure.

In all mode of executions, after casting process, this curing medium is preferably cured.Solidification can obtain the support of heating.It is also feasible for adopting such as ultraviolet or other radiation to accelerate the curing process.Chemical substance is adopted also to be feasible.Accordingly, can replace pouring into a mould and method such as (plastics) injection moulding of adopting other suitable.

Shown mode of execution shows the application of structure of the present invention in damper, such as, as the buffer in vehicle, bicycle or prosthese.Accordingly, this structure can be used as valve without the need to the piston of activity and piston rod.

In all mode of executions, take out at least one placeholders after solidification, for opening the flow path of described runner and/or runner.

Especially manufacture according to aforesaid method according to assembly of the present invention.Assembly of the present invention have spacer body and at least one to be located on this spacer body and extend past spacer body or along spacer body extend and there is the runner of at least one flow path, for affecting magneto-rheological fluid along the runner of spacer body or the flowing in its regional area.Spacer body comprises at least one field generator for magnetic for generation of magnetic field and field closing device.This closing device is so filled curing medium together with field generating means at least one placeholders situation of use, and namely this spacer body has at least one predetermined three-dimensional runner.Runner can be used after placeholders is taken out.

Assembly according to the present invention has many advantages, because it can simply and can repeatedly to manufacture and practical function runs reliably.

The spacer body that assembly of the present invention preferably provides hydraulic pressure to seal, it especially can only flow through the runner that is arranged at here or flow through the flowing connection set be located at here.Now, negotiability especially depends on the magnetic field of this field generator for magnetic.If do not have magnetic field, then magneto-rheological fluid can flow through this runner substantially in the clear.Utilize high magnetic fields, also preferably can interrupt flowing through of magneto-rheological fluid completely.

Curing medium can be or comprise at least one mould material.Curing medium can be poured into a mould or spray.Such as can adopt at least one material, it is flowable under certain condition, and is therefore poured into a mould or spray, with Post RDBMS.Curing medium can be such as curing medium or comprise at least one curing medium.

Preferably this field generator for magnetic is filled and/or pours into a mould together with the field closing device of spacer body and/or encapsulate pressure injection curing medium.

Because the assembly of spacer body is especially mutually cast in together and is therefore interconnected securely by curing medium, therefore the permanent function of Reliable guarantee.And according in the assembly of prior art, generally each independent assembly must be connected with other assembly and be sealed by bothersome relative to other assembly.Such installation in trouble and simultaneously may breaking down.And assembly of the present invention provides a kind of assembly run well by simple mode.At this, even if this curing medium also provides when having the inexactness or surface error or roughness that are caused by the more discrete of machining tolerance for the firm of some assemblies and the connection of permanent sealing.

As curing medium, such as, can adopt mould material and/or itself solidify and the filler especially hardened.Such as it is possible that bicomponent material is used as curing medium, first it be flexible machinable and harden alone subsequently.Now, sclerosis can be carried out under such as higher temperature under prescribed conditions.But also it is possible that described sclerosis is without the need to specific condition, such as, at room temperature carry out.

Especially the hydraulic pressure of the assembly of spacer body is allowed to be tightly connected.Especially, by this curing medium, substantially or preferably virtually completely by the flow restriction of magneto-rheological fluid to this runner.But also can specify at least one independent by-pass flow runner.

By using one or at least one placeholders, the shape that the space achieving this runner accurately limits.This placeholders can be formed integratedly.This placeholders also can be made up of multiple separate part.After filling, placeholders is removed and preferably can re-uses.Placeholders can be made up of shim or comprise at least one such shim.Shim can be metal or be made up of other suitable material.

Also can adopt the placeholders be made up of the material as wax or adopt eutectic metal.Therefore placeholders can be eluted from spacer body after filling or be melted.Also the dissolving utilizing chemical substance can be carried out.

Placeholders itself or melted material can be adopted again.

Preferably at least one runner is divided at least two flow paths by least one partition wall.Now flow path also can be regarded as runner.Preferably, at least two flow paths are fully separated over the whole length at least partly or especially mutually.By being such as this partition wall of preferred ferromagnetic thin demarcation strip form (but being not limited thereto) substantially, with simple means, runner is divided into two runners or flow path.Thus, the still effective influence that the flowing of runner is crossed in convection current is achieved.In single situation, adopt thin demarcation strip as partition wall.Preferably this partition wall is formed relative to the such unfertile land of the flow path height of runner.Thus only two reduce whole flow cross section, little physical dimension can be kept thus.The side of partition wall now can have shape favourable with regard to flow technique.

Particularly preferably, this partition wall is formed with independent demarcation strip form and together with being cast in spacer body by curing medium.Thus, simple manufacture and durable assembly is realized.

Preferably this partition wall has at least one locking device, and the assembly of itself and curing medium and/or spacer body is fixed together, even if thus also can ensure reliable function at elevated pressures.Especially two, the three or more such as locking device of form such as in locking teeth, latch hook, lock ring, locked groove is provided with, to realize the firm connection between partition wall and spacer body.

In all mode of executions, at least one flow path has flattened cross-sectional in the flow direction, and wherein this cross section can be straight or arc.Especially the width of this flow path is the twice of the flow path height on field wire direction, is especially at least four times of the flow path height on field wire direction.Especially, the flow-path-length on flowing to is greater than the flow path height transverse to flowing to.By the flat gap as flow path, allow the effectively magneto-rheological particles of impact in magneto-rheological fluid, thus allow through the circulating resistance of runner fine graded adjustment or regulate continuously, until blocking.

Especially preferred in all mode of executions, at least one field generator for magnetic is formed with electric coil device form, and it corresponds at least one core body be made up of ferromagnetic substance.Especially this this core body of electric coil device is poured into a mould by curing medium together with spacer body.

Electric coil device allows to press provisioning change reaction magnetic rapidly flexibly at short notice, thus such as realizes the real-time control to circulation drag effects by the runner of this segregating unit.

In particularly preferred embodiments, core body transversely has at least one side narrowing portion at its longitudinal axis.This narrowing portion can on one or more longitudinal side of core body and/or side or completely around core body around formation.Thus achieve less structure space, it provides significant advantage when the assembly to structure space sensitivity.

By this narrowing portion, the ferromagnetic substance of core body is utilized better, and its saturation flux density is usually apparently higher than the saturation flux density of streaming flow.In addition, the mean winding length of coil can reduce, and this can improve its electrical property significantly.

Advantageously, this core body by the coil carrier that it is equipped with electric coil device around.

Coil carrier such as can be made up of plastics and simplify coil winding.Meanwhile, reel time or work subsequently use in avoid winding to sustain damage in iron core edge.Also it is possible that coil to be directly wound on coil carrier and to add core body subsequently.When spacer body is such as formed in piston-like, coil carrier preferably allows coaxial positioning.

Preferably at least one flow path is arranged between the insulation cover cap of core body and field closing device.Such mode of execution to allow effectively to make full use of from insulation cover cap out, crosses flow path and the magnetic field led back through field closing device, thus provides effective assembly.

Especially at least one insulating boot cover rounding and preferably substantially cylindrical portion section form and at least substantially to adjoin with a flow path.

In a preferred embodiment, spacer body is formed with movement and is arranged on movably in rotation restricting device for compressor piston as piston.Preferably this piston is connected with piston rod.But piston also can be connected with the piston rod of both sides and so-called coherent piston rod.Preferably at least one piston rod is that bolt connects, is threaded into or is tightened.

In such mode of execution preferably, electric coil device is the longitudinal axis orientation transverse to rotation restricting device for compressor piston.In other words, electric coil device is not parallel to piston movement to arrange, but especially arranges perpendicular to piston movement.But coil direction also can be parallel to piston movement forms (coaxial coil).

The axis of preferred wire coil apparatus carrys out orientation transverse to the longitudinal axis of rotation restricting device for compressor piston.Field closing device preferably forms piston main body.Piston main body such as by ferromagnetic substance as iron material is formed.

Field closing device preferably surrounds this electric coil device in such mode of execution in piston circumference.Thus, when electric coil device is horizontal, when electric coil device lateral is arranged in its longitudinal axis line, this closing device effectively can close this, thus realizes simple and effective structure.

Particularly preferably be in all mode of executions, this piston main body has at least one side recess, groove, groove, uneven, very coarse surface or similar structure, and it is filled with curing medium or mould material or filler at least partly.By such mode of execution, ensure that the connection firm especially in spacer body, thus when the High Pressure Difference of spacer body both sides and maximal pressure difference reach 100,200,400 or even 600 bar described assembly also enough firm.

To obtain other advantage of the present invention and characteristic by following to the description with reference to the embodiment described in accompanying drawing, accompanying drawing is depicted as:

Fig. 1 shows the schematic cross-sectional according to assembly of the present invention being embodied as damper form,

Fig. 2 shows the schematic cross-sectional by assembly 1,

Fig. 3 shows the cross section of the view perpendicular to Fig. 2 of the assembly according to Fig. 2,

Fig. 4 shows for the piston according to invention components,

Fig. 5 shows the core body for the assembly according to Fig. 2,

Fig. 6 shows the partition wall for the assembly according to Fig. 2,

Fig. 7 shows the core body with coil carrier and partition wall of the assembly for Fig. 2,

Fig. 8 is the stereogram of the assembly 1 of field-free closing device,

Fig. 9 is the stereogram of the assembly 1 of field-free closing device,

Figure 10 is the schematic diagram of lamellar body,

Figure 11 shows the very schematically sectional elevation of another assembly,

Figure 12 shows the very schematically front elevation of another assembly,

Figure 13 shows the sectional elevation of the assembly according to Figure 12.

Damper 50 of the present invention is shown in FIG with very schematic sectional elevation.Damper 50 has housing 43, and this assembly 1 plays the effect of piston 30 in housing.Piston 30 is connected with piston rod 32, and piston rod stretches out from housing 43.

Also it is possible that provide valve of the present invention.The present invention is not limited to damper structure, but also can for valve.Now, such valve such as also can (but not only being) be used in damper, such as, be used for the damper in piston as valve, or as outer valve.

In the damper 50 of Fig. 1, be provided with compensated cavity 42 in order to the volume of compensating piston bar 32, it is separated by the remaining part volume integral of piston separator 41 with damper 50.Also can adopt a piston rod respectively in the both ends of the surface of piston, compensated cavity and piston separator can be saved thus.Sealing 51 is as the sealing medium (slipper seal) between the piston 35 and housing 43 of motion.Sealing 51 also can be permanent-magnet sealing.

As the assembly 1 of piston 30 as spacer body 2 and to possess at this be the field generator for magnetic 8 that electric coil device 19 form is formed.Can see core body 20 according in the cross section of Fig. 1, it is surrounded by the coil carrier 23 manufactured by plastics.Electric coil device is wound around around coil carrier 23.

Piston 30 comprises piston main body 35, its be used as a closing device 9 simultaneously and this ringwise form of conductors form.According to seeing runner 3 and 4 in the view of Fig. 1, they are divided into two flow paths 5 and 6 by partition wall 11 separately at this.

Fig. 2 shows assembly 1 with zoomed-in view, and it is also formed in piston 30 shape at this.Piston 30 is connected with piston rod 32.Piston main body 35 and core body 20 and coil carrier 23 component parts 7 respectively, they this spacer body 2 in by being that the curing medium 10 of mould material 10 or plastic form is interconnected.Flowing through piston 30 can be carried out flowing on 15 by runner 3,4.

Fig. 3 is to show the assembly 1 according to Fig. 2 perpendicular to the sectional view of the sectional view according to Fig. 2.Here, core body 20 is illustrated along its longitudinal extension distance 26.Core body 20 is basically parallel to drawing around, its independent winding at this by coil device 19 and extends.In piston main body 35, be provided with side recess 45 or groove, it is filled curing medium 10 when cast or spray.After solidification, side recess 45 forms effective protective gear (form fit), even if it under high pressure also reliably stops electric coil device 19 to extract out from piston main body 35 or extrude.

Also figure 3 illustrates mould 40, assembly 1 is admitted in this mould when mounted, adds curing medium subsequently to ensure that the hydraulic pressure in spacer body 2 is tightly connected.Mould 40 has the configuration matched with the predetermined profile of assembly 1.By this profile, piston the and especially district that becomes a mandarin of runner 3,4 can be optimised with regard to fluid technique, now this curing medium 10 can with the whole end face district of such as mould material form nearly cover piston main body 35.

Be similar to mould 40, can further mold be adopted, such as, for constructing opposed region.Especially the runner be made up of piston main body in figure 3 and the fixing of piston rod also can be realized by correspondingly configured curing medium.

Fig. 4 shows the piston main body 35 for the assembly 1 according to Fig. 2 or Fig. 1.Piston main body 35 is in this as field closing device and return again after flowing through runner and draw this magnetic field.Can know at this and see runner 3 and 4.Runner 3 and 4 has flat cross section 39 respectively.In addition, be provided with multiple mounting hole 44, they are such as operating by suitable instrument.Become a mandarin profile and the drainage profile of runner 3,4 by edge rounding, form the modes such as section and advantageously form in flow technique.

Not shown in the application of cost sensitivity the preferred design proposal of institute, wherein abandon ferromagnetic piston main body 35, or it can be made up of plastics or similar material.At this, piston main body can manufacture in such operation, and now coil is poured into a mould or encapsulated pressure injection and partition wall is fixed.Especially advantageously, in same operation, cast or spray enter this piston rod simultaneously.

In such a configuration, magnetic loop can be closed by housing 43.When partition wall or runner are placed on piston diametrically completely, plastics or mould material is not had to be arranged in magnetic loop.

Also it is possible that except the runner 3 (with 4) in magnetic field, by said method also produce at least one not in magnetic field such as in the runner (by-pass flow passage) of single hole form.Possible position can be the extending portion of mounting hole 44 viewed from side between passage 3 and 4, thus occurs by-pass flow passage.This such as can be realized by the placeholders 29 in single wire-shaped, and it is removed after casting process.Thickness wiry such as can between 0.1mm to 10mm.Placeholders 29 also can by jacket, and here, enclosure outer surface engages with mould material and placeholders (wire) can be drawn out of.The separating device taken out to simplify can being abandoned thus, this simplify process.Enclosure internal surface preferably can have sliding layer, thereby simplify extraction.

Fig. 5 shows the core body of the assembly 1 of Fig. 2 with independent zoomed-in view.Insulation cover cap 24,25 rounded and be matched with the radius of piston 30 or the inside radius of runner 3,4 at this.Insulation cover cap 24 is with damp channel 3 and especially the flow path 6 of runner 3 is adjacent.Insulation cover cap 25 is directly adjacent with the flow path 6 of runner 4 at this.It is also feasible that insulation cover cap 24 and 25 is such as coated with thin layer, makes to there is small distance between real insulation cover cap 24,25 and runner 3,4.

Core body 20 also can be manufactured by multiple parts, and here, these core components can have different magnetic.In addition, some regions of core body can be hard magnetics, and other region is non-magnetic (nonferromagnetic).By the structure that core body is made up of multiple parts, also only after winding coil, just core body can be added coil carrier 23.

Fig. 6 shows the partition wall 11 of 12 forms in demarcation strip, and it has the locking device 13 of 14 shapes in locking teeth at this.Utilize locking device 13 locking teeth 14 in other words, partition wall 11 locks when curing medium is poured into a mould, and makes partition wall 11 maintain static and reliably be held in the component 1 in position according to the rules.

Preferably in both sides, at least one metal foil, adhesive tape, tunic or paint can be applied on demarcation strip 12 at central area, its in casting process, form placeholders and be chemically dissolved with the help of a suitable solvent subsequently, ablation or fusing removing.There is described runner thus.Placeholders also can be made up of eutectic metal, and it melts after pouring and is removed again.

Core body 20, two demarcation strips 12 that Fig. 7 shows by coil carrier 23 surrounds are laid thereon.A flow path 6 of the visible runner 3,4 of difference between insulation cover cap 24,25 and demarcation strip 12.Coil carrier 23 is provided with locking device 34, and it is for receiving this partition wall 11 in a predetermined manner.

At this, core body 20 has narrowing portion 22 transverse to its longitudinal axis 21, thus in the axially acquisition structural volume of piston 30.By narrowing portion 22, coil 19 axially stretches less, thus achieves the shorter assembly of axis 1.

Runner 3,4 has length 18 at this flowing on 15, and this length is obviously greater than the height 17 on longitudinal axis 21 direction of core body 20.The width 16 of the flow path 5,6 of runner 3,4 here extends along a curve and is also obviously greater than the height 17. of independent flow path 5,6

For the representative value of the length 18 of runner 3,4 between about 10mm and 60mm.Width 16 is between about 5mm and 20mm, and preferred channel height 17 is between about 0.2mm to 2mm.

Now can be provided with multiple flow path.Such as, five, seven, eight, nine or ten flow paths correspond to a runner.Also it is possible that be provided with three, a four or more runner.Generally, the wall thickness of partition wall 11 is between 0.1mm and 1mm.

Free-flow cross section as all runner sums depends on the power scope of channel shape, fluid used, piston area and expectation.Typical flow cross section is at about 10mm ²to about 200mm ²in scope.Average flow velocity up to 30m/sec or even 60m/sec or higher is feasible.Volume flow obviously depends on size and can to reach in some instances and more than 100ml/sec.Now, the value of 200ml/sec or 300ml/sec or higher is also feasible.Electric coil device 19 can be made up of different materials.It is such as by copper or be also made up of analogs such as anodized aluminums.But multiple coil device 19 also can be set.

Demarcation strip 12 also can be embodied as plane, and this obtains therebetween plane runner together with the core body 20 with flat insulation cover cap 24.

The assembly 1 not with piston main body 35 is shown in fig. 8 with stereogram.Can know and see the cable 38 of guiding inner electric coil device 19 into and the demarcation strip 12 runner 3,4 being divided into respectively two flow paths 5,6.The locking device 34 for axial restraint partition wall 11 or demarcation strip 12 can be seen, the inner side surface of its piston main body 35 that reclines under installation state.Fig. 8 also have Fig. 9 show curing medium cast after state, eliminate piston main body 35 in order to more know in the view for the purpose of overview respectively here.

Also can know and see flange 46, it is by curing medium 10 and to be made up of mould material or spray plastics 10 at this and to be full of the side recess 45 in piston main body 35.In fig .9, in shim, the placeholders 29 of 36,37 forms is still admitted in assembly 1.After sclerosis, shim 36,37 can be removed, thus leaves runner 3,4 flow path 5,6 in other words of the size with accurately regulation.For this reason, shim 36,37 is drawn out of in the axial direction.These shims also can be the assemblies of the mould 40 according to Fig. 3.Along with mould 40 taking-up or after removal, shim is drawn out of in the axial direction.

Such as make reusable shim 36,37 sometimes accurately have desired size by grinding operation etc., thus the reproducible assembly 1 of highi degree of accuracy can be processed.

Also it is possible that placeholders 29 or shim 36,37 are such as chemically dissolved with the help of a suitable solvent or melt.Thus each assembly needs new shim 36,37.But the material of fusing can directly or after cleaning or filtration be easily reused.

Also it is possible that surround placeholders 29 or shim 36,37 with movable cover/cover, wherein, enclosure outer surface can engage with mould material and placeholders 29 can be drawn out of.Figure 10 shows the lamellar body 28 as placeholders 29, and it is as the inserting member in assembly 1.For this reason, first lay shim 36 or 37, then partition wall 11 is installed, lays the second shim 37 or 36 subsequently.Together with the core body 20 surrounded by coil carrier 23 and coil 19, inserting member 27 is introduced into piston main body 35.Both are admitted to mould 40, fill curing medium 10 to subsequently this cavity.In order to avoid air entrainment, can process under vacuo and/or under superpressure.

In identical structure space, replace by the above-mentioned lamellar body 28 be made up of a partition wall 11 and each shim 36,37, also can load the lamellar body be made up of in conjunction with three thin demarcation strips such as two thin partitioning walls.Core body 20, piston main casing 35 and should described difference be compensated in order to this curing medium together with the size of the coil carrier 23 within coil 19 and form and fix all components when solidifying and change.Therefore, it is possible to manufacture different runner designs (modification) without the need to sky high cost.

Lamellar body can comprise any amount of partition wall 11, and wherein typical lamellar body can comprise 1 to 10 or 20 or more partition wall.In order to install, usually adopt partition wall quantity+1 placeholders 29.

Figure 11 shows the very schematically sectional elevation of another invention components 1 comprising spacer body 2.Spacer body 2 has a closing device 9, runner 3, core body 20 and the electric coil as field generator for magnetic 8 in spacer body 2.Spacer body 2 is filled by curing medium 10.Before filling, the inserting member 27 as placeholders 29 is added.Placeholders 29 for forming the reproducible runner 3 of space boundary in spacer body 2.Placeholders can shim form form or by can wash-out, fusible or soluble material forms, it is removed again after curing or hardening.Therefore, this placeholders can be made up of metal, but or is such as made by waxed.

In order to not being entirely enclosed the withstand voltage connection (sealing) that (as relative to runner) in pressure injection region ensure between parts 7 and field closing device 9, core body 20 has at least one vacancy portion in described region, and it fills with mould material or material 10 in casting process.

Figure 12 shows the very schematically front elevation of another assembly 1, and it is just as comprising the runner 3 only with unique flow path according in the example of Figure 11.Runner 3 does not segment at this.Figure 13 shows the sectional elevation of the assembly 1 according to Figure 12.Spacer body 2 has again a closing device 9, runner 3, core body 20 and the electric coil as field generator for magnetic 8 in spacer body 2.

A space must be vacated between field generator for magnetic 8 and the interior edge face of field closing device 9.This realizes by such as adding a placeholders be made up of wax 29.After cast, this placeholders is melted and removes.Replace wax, also can adopt other material common in pouring process.Placeholders 29 also can so be shaped, and namely this placeholders is shaped corresponding to runner.The space vacated or multiple such space can on each arbitrary positions of this assembly.

As placeholders 29, also can adopt other fusible material, thermoplastic etc., this placeholders 29 can be removed again by fusing after filling.

At this, one end of spacer body 2 is provided with manifold 48, it is by multiple and be three openings 49 and adjacent chamber at this.Also it is possible that adopt two different placeholders 29, namely such as the formation of a shim 36 of runner 3 and another placeholders for the formation of manifold 48.

Field closing device 9 at one end side or both end sides can have screw thread, and piston rod is such as arranged on this screw thread.

By the working method of the defined of partition wall and shim and the size that limits, can low cost and simply in large quantity manufacture high-precision assembly.By error accurately, also a runner can be divided into multiple flow path, they are separated by the partition wall in fan-shaped.Because all parts are highi degree of accuracy processing, therefore total error is little.This is very favourable, because when the size of multiple independent flow passage or flow path is different, sizable load may be had to act on these independently on flow path or runner, and this may cause partition wall 11 or demarcation strip 12 to bend.

In all cases, the form that separation wall energy is fanned with arc is formed in circular piston.This piston rod can be connected by bolt or bonding.

When the multiple partition walls 11 in fan-shaped stack together, monomer error is summed into larger total error, and it may be disadvantageous when batch part.So the performance of multiple individual actuators may be visibly different.Want highi degree of accuracy processing accessories with make total error low be bothersome and batch time be expensive.The invention provides a kind of favourable assembly 1 and a kind of favourable manufacture method.Can utilize whereby and can produce in enormous quantities and even may have the assembly providing total error less compared with the part (=cheapness) of big error.

Especially, all component also can be hydraulic pressure sealing under large pressure/power.

This assembly can make adaptive response by changes of magnetic field, thus approximate occurs that liquid viscosity changes.High pressure break-make is a major advantage (structure space is little, and mainly length is short) of sector structure.

Partition wall 11 (also referred to as fan) normally thin-walled form and have in a preferred embodiment at the thickness 47 about between 0.3mm and 0.7mm.The structure height of structure space can be saved thus.The height 17 of flow path 6,7 is especially between 0.2mm and 2mm.In some structure example as in the energy absorber of steering wheel, many and such as 14 partition walls 11 in fan-shaped can overlap up and down specifically.When two such assembly parties, altogether can provide 30 or more passages, described passage bears up to 600 bar or the 60N/mm that causes thus ²or higher face load.

If but flow path 6,7 has distinct distance separately, then obtain magnetic intensity devious when magnetic field applies thus: the magnetic field in higher flow path is lower than the magnetic field in not too high gap or lower flow path.Different magnetic field affects magnetic rheological liquid by different way, and has occurred lower pressure in higher flow path, and has occurred elevated pressures in lower flow path.This may cause the obvious horizontal load of partition wall 11, and partition wall may bend, and even damages.

But independently to this, also have the height on field wire direction of this gap or flow path under definitely identical magnetic field conditions to be very important, because lower height causes larger possible locking pressure.The different heights of different flow paths causes different locking pressure, and then build-up of pressure is poor.

Pressure difference between some independently divided walls 11 causes the power difference acting on partition wall 11, and this may cause thin fan 12 to produce distortion.Especially under high pressure, such distortion may cause material to bear high load and actuator function fault.This even may bad contact to two demarcation strips 12 because of distortion, and this causes magnet short-cut path, and then causes a runner or a flow path internal pressure wherein almost to reduce completely.Give away secrets because of carelessness (leakage) of several individual passage perhaps can cause similar load or shortcoming.

The present invention allows to avoid the bending of demarcation strip 12 by identical influent stream.

Electric coil device 19 and partition wall 11 are poured into a mould or an advantage bonding together is also in cast or secures this partition wall 12.By forming toothing in the exterior lateral area of partition wall 11, can be implemented in the form fit in spacer body 2.Can save structure space by the narrowing portion of iron core 20, this is very important to running length and structure length.

Side recess 45 in piston 30 is for the assembly parts that is made up of electric coil device 19, core body 20 and coil carrier and piston 30 form fit.Side recess 45 also can be formed with the recess of circular or dihedral or toothing form.Side recess also ensure that sealing.

Bending partition wall 11 there is provided herein higher efficiency.Straight partition wall has superiority in manufacture cost.

Coil carrier 23 keeps partition wall 11 vertically before cast.Utilize shim 36,37, partition wall 11 is kept by radial direction in cast forward position.

In this manufacture process, can not the part of the demoulding first be eliminated.Demoulding part can be coated with grease or oil.Also special release agent can be adopted.

Subsequently, cable 38 soldered on be connected with coil 19 in other words.Piston 30 is threaded with piston rod 32 and/or bonding.

Inserting member 27 or lamellar body 28 is utilized to assemble the sandwich structure of coil 19, shim 36,37 and partition wall 11.By especially the limited partition wall 11 i.e. thickness of fanning strip, all errors are eliminated.

This sandwich structure is moved in this piston 30.If adopt mould material or plastics as curing medium, then it is perhaps heated.When using vacuum unit, piston is correspondingly positioned, and evacuated housing is closed and vacuum pump is switched on.By vacuum, air is pulled out from piston 30 and curing medium 10 flows into piston, thus occurs air entrainment as little as possible.Air entrainment itself may weaken the sealing of component and fix.

After the hardening, can carry out the demoulding, wherein shim 36,37 is drawn out of from piston.Shim 36,37 also can be that the part of mould 40 or separable region mould are connected and are taken out together when the demoulding.

Finally, these runners 3,4 cleaned fall remaining curing medium or mould material, if need to do like this.

Locking device 13 on partition wall 11 such as can rounded, triangle or polygon be formed.Can barb be set.Many teeth also can be bending and such as overturn downwards.

Partition wall 11 is preferably made up of magnetic conductance (ferromagnetism) material.Wall thickness preferably remains unchanged, but also can be different.Partition wall can transverse in the width flowed to or along flowing to see it is different-thickness, such as, be also taper.Partition wall also can have other shape any, such as waveform.Also two or more partition wall with different designs, shape or material can be set in front and back.Between the partition wall arranged before and after seeing along the flow direction, also can allow gap before cast, this gap is served and is filled by curing medium.Also sensor can be added as magnetic field strength transducer or temperature transducer, subsequently encapsulated pressure injection or encapsulating injection moulding in this gap.

When utilizing the actuator of high-pressure activated, in the flow direction, produce large power due to leading away described end face and magnetic flow liquid (MRF) shearing stress.Poured into a mould by overlap, described power can well be derived and be worked as plane glue.

The surface of partition wall 11 can be smooth, but is being locally at least preferably coarse or hacking.Be able to thus engage better with curing medium.

The core body be made up of ferromagnetic substance can shrink on side and/or side direction, thus can realize more Multiple coil when structure space system.Permanent magnet also by hard magnetic material as AINICo is formed, or also can be incorporated in core body to produce certain magnetic field to obtain the fundamental force of regulation in currentless situation by core body.

Because be used multiple times as the shim 36,37 of placeholders 29, thus they are such as ground manufacture accurately.Therefore the higher manufacture cost of shim is shared many components.

In order to approximate elimination machining error, by shim accurately and the correct partition wall of thickness combined and install subsequently.

Placeholders 29 or shim 36,37 also can manufacture with dimensional tolerance range lower limit and so be formed, and namely height error is distributed on all runners by the thickness deviation of partition wall 11 by they as far as possible equably.The curing medium that now may occur or mould material be mingled with into runner normally wall very thin and can be removed subsequently.

Cable 38 is preferably cast in piston rod 32 simultaneously.Except cable 38, also can pour into a mould other cable for such as temperature transducer etc. simultaneously.Therefore also need not packed-piston bar 32 again.The anti-rotation device of piston rod also can integratedly add.This piston rod so can be formed in connection area, namely by overlapping with curing medium and obtain being connected with the form fit of piston.

Or cable 38 also can by additional seal (O shape ring, special bolt etc.).For this reason, can direct-on-line circle and/or piston enter or pour into weldering sales finished product plug piece spray.In order to ensure the sealing between imbedding piece after the encapsulating pressure injection of plastics or mould material 10, they can be coated with the analogs such as melten gel.Stress between the various components can be eliminated thus, especially when temperature variation.

The contracting cover flexible pipe that the wire being used to electric coil 19 can have in inner side, outside or interior outside are coated with melten gel.

The layout of the preferred employing electric coil device 19 with " accumbency " as shown in Figure 2, wherein, coil carrier 23, core body 20 and partition wall 11 are poured into a mould.Wherein, preferably corresponding mould 40 is adopted and especially former.Subsequently, this unit can be added into loop, residual magnetic field as in piston 30 or valve.Then, produce fixing being tightly connected, it was at least firm before reaching certain axial force.Described connection can be realized by glue, ultrasonic welding, melting glue or screw thread.

Also this connection can be produced by spray operation.For this reason, also can this curing medium of spray or mould material." cast " also can be regarded as spray.Plastics are preferably utilized to carry out encapsulating pressure injection.

In a modification, the encapsulated pressure injection of coil device 19 complete and " the fan seat " that preferably form slightly outwardly simultaneously.Together with partition wall 11 (fan), coil device 19 is moved in piston 30, and thus one, fan seat is pressed inwardly compels and partition wall 11 clamps.

In a modification, adopt and above-mentioned similar fan seat, but it is a part for coil carrier.Core body, be pushed in piston with the coil carrier of coil device 19 and partition wall 11, at this, the protrusion tab of fan seat is bending and be forced on partition wall 11.Thus, partition wall 11 is held in place, and runner is sealed relative to coil device 19, this simplify cast.

Ultrasonic welding is also feasible, produces at this unit affecting this runner.Ultrasonic welding can be utilized add subsequently or be solded into partition wall 11.Now, partition wall 11 can side or diametrically from outside to inside (towards core-center) access this curing medium or mould material.

A kind of alternative processing method regulation, so pour into a mould or encapsulate pressure injection plastics in a mold the core body with coil carrier and coil, that is, flow passage area and partition wall keep idle.This component is fixed in piston main body together with partition wall in further operation.

Particularly preferably be, the plastics in divider wall section with only slight beyond size or utilize a fixed mold so to be injected, that is, partition wall is clamped by plastics when being pressed in piston main body.

This plastic mould also can have the similar structure such as latch hook, can be simply fixed in piston main body.Piston rod or partition wall also can be fixed.

Not necessarily, spacer body 2 affects the whole flowing of magneto-rheological fluid along the runner 3,4 occurred.This structure also can have can outside described assembly and/or within extend one or more runners.

Multiple demarcation strip 12 need not have identical size in a modification.Their size also can be different.

Core body 20 also can be made up of the many runners with demarcation strip 12.

In all mode of executions, when at least one partition wall 11 such as cut by line, precision casting or similar fine structure manufacture method manufacture time, this at least one partition wall also can be at least one fillet (but being not limited thereto), field closing device 9 or the fixing-assembly of field generator for magnetic 8.

Magnetic field need not such as be closed by field closing device 9 as shown in Figure 2 all the time, but also can only be closed by component 43 (cylinder).Such as can flange 46 and directly moving in post without male offspring according to the piston of Fig. 8.This magnetic field also can be closed by field closing device 9 and component 43 (cylinder).Therefore cylinder 43 is inevitable has ferromagnetic property at least partly.

Reference numerals list

1 assembly

2 spacer bodies

3 runners

4 runners

5 flow paths

6 flow paths

7 parts

8 field generator for magnetic

9 closing devices

10 curing mediums

11 partition walls

12 demarcation strips

13 locking devices

14 locking teeths

15 flow to

16 width

17 height

18 length

19 electric coil devices

20 core bodys

21 longitudinal axis

22 narrowing portions

23 coil carriers

24 insulation cover caps

25 insulation cover caps

26 axis

27 inserting members

28 lamellar body

29 placeholders

30 pistons

31 rotation restricting device for compressor piston

32 piston rods

33 longitudinal axis

34 locking devices

35 piston main bodies

36 shims

37 shims

38 cables

39 flattened cross-sectionals

40 moulds

41 isolation pistons

42 balance spaces

43 housings

44 mounting holes, by-pass flow passage

45 side recesses, groove

46 flanges

47 thickness

48 manifolds

49 openings

50 dampers

51 sealings

Claims

1. one kind manufactures the method for assembly (1), this assembly has spacer body (2) and at least one is arranged on the runner (3 extended on this spacer body and along this spacer body (2), 4), this runner has at least one flow path (5, 6) for affecting the described runner (3 of magneto-rheological fluid along described spacer body (2), 4) flowing, wherein said spacer body (2) comprises a closing device (9) and at least one field generator for magnetic for generation of magnetic field (8), it is characterized in that, described field generator for magnetic (8) and described field closing device (9) in use for the formation of this runner (3 at least partially, 4) fill by least one curing medium (10) when at least one placeholders (29), for forming at least one predetermined three-dimensional runner (3 on this spacer body, 4), this runner can be used after described placeholders (29) is removed.

2. method according to claim 1, wherein, the connection formed by described curing medium is hydraulic pressure sealing, thus makes described magneto-rheological fluid have to flow through described runner.

3. method according to claim 2, wherein, utilize coil carrier (23) to surround core body (20), and be wherein winding on described coil carrier (23) as the electric coil device (19) of field generator for magnetic (8).

4. method according to claim 3, wherein, at least one partition wall (11) is arranged on described coil carrier (23).

5. method according to claim 4, wherein, at least one inserting member (27) is made up of lamellar body (28), and this lamellar body is formed by as first shim (36) of placeholders (29), at least one partition wall (11) and at least one second shim (37) as placeholders (29).

6. according to method in any one of the preceding claims wherein, wherein, at least one inserting member (27) is made up of placeholders (29).

7. according to method in any one of the preceding claims wherein, wherein, described core body (20) is introduced in described field closing device (9) together with described coil carrier (23) and described electric coil device (19) and at least one inserting member (27).

8. according to method in any one of the preceding claims wherein, wherein, described filling is especially adopting in negative pressure and/or superpressure situation to utilize the mode of described curing medium (10) cast and/or spray to carry out.

9. according to method in any one of the preceding claims wherein, wherein, after casting process, described curing medium (10) solidifies, and removes at least one placeholders (29) after solidification.

10. according to method in any one of the preceding claims wherein, wherein, described placeholders is removed by from described spacer body.

11. according to method in any one of the preceding claims wherein, and wherein, described placeholders is removed by from described spacer body by melting, dissolving or wash-out.

12. 1 kinds especially according to the assembly (1) that the method for aforementioned claim obtains, this assembly has spacer body (2) and at least one is arranged on the runner (3 extended on this spacer body and along this spacer body (2), 4), this runner has at least one flow path (5, 6) to affect the described runner (3 of magneto-rheological fluid along described spacer body (2), 4) flowing, wherein said spacer body (2) comprises a closing device (9) and at least one field generator for magnetic for generation of magnetic field (8), it is characterized in that, described field closing device (9) and described field generator for magnetic (8) are filled by least one curing medium (10) when using at least one placeholders (29), described spacer body is made to have at least one predetermined three-dimensional runner (3, 4).

13. assemblies according to claim 12 (1), wherein, described placeholders can be used again.

14. according to assembly in any one of the preceding claims wherein (1), and wherein, at least one runner (3,4) is divided at least two flow paths (5,6) by least one partition wall (11).

15. according to assembly in any one of the preceding claims wherein (1), and wherein, described partition wall (11) has at least one locking device (13).

16. according to assembly in any one of the preceding claims wherein (1), wherein, at least one field generator for magnetic (8) is formed with the form of electric coil device (19), and described field generator for magnetic is provided with at least one core body (20) be made up of ferromagnetic substance.

17. assemblies according to claim 16 (1), wherein, described core body (20) has at least one side narrowing portion (22) perpendicular to longitudinal axis (21).

18. according to assembly in any one of the preceding claims wherein (1), wherein, at least one flow path (5,6) is arranged between the insulation cover cap (24,25) of described core body (20) and described field closing device (9).

19. according to assembly in any one of the preceding claims wherein (1), wherein, described spacer body (2) is formed with the form of piston (30), and can be directed in the mode of motion in rotation restricting device for compressor piston (31), and wherein, especially piston rod (32) is connected with described piston (30).

20. assemblies according to claim 19 (1), wherein, the axis (26) of described electric coil device (19) is perpendicular to longitudinal axis (33) orientation of described rotation restricting device for compressor piston (31).

21. assemblies according to claim 20, wherein, described field closing device (9) forms piston main body (35), and this piston main body (35) has at least one undercut portions (45).

22. according to assembly in any one of the preceding claims wherein, and wherein, described runner (3,4) is defined by described curing medium (10) at least partly in described piston (30).